Compare JSON API responses, HTTP headers, and text content online. Free, secure, and privacy-focused - your data is never stored or logged.
Enter URLs, cURL commands, or text content to start comparing
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Enter data above and click "Compare" to see the diff
Powerful features designed for developers and QA engineers
Compare two HTTP API responses including headers, status codes, and response bodies with syntax highlighting.
Use JSONPath queries to focus on specific parts of your JSON data. Perfect for large API responses.
Switch between side-by-side and unified diff views. Choose from text-style or GitHub-style diff rendering.
Secure proxy for API requests with no data storage. Your comparison data is processed locally and never stored or logged on our servers.
Paste cURL commands directly or use simple URLs. Support for custom headers, methods, and request bodies.
Completely free to use with no registration required. Perfect for developers, QA engineers, and API testing.
Everything you need to know about comparing HTTP API responses and JSON data
Simply enter two URLs or paste cURL commands in our tool, click Compare, and view the differences in headers, status codes, and response bodies with syntax highlighting. Our diff viewer shows exactly what changed between the two API responses.
Yes! Our tool provides completely free JSON diff comparison with advanced features like JSONPath filtering, multiple view modes, and client-side processing to ensure your data privacy. No registration or payment required.
JSONPath filtering allows you to compare specific parts of JSON responses using queries like $.data.items[*].name. This helps focus on relevant data and ignore noise in large API responses, making it easier to spot important differences.
Yes, absolutely! While API requests are proxied through our server to handle CORS restrictions, we never store, log, or retain your data. All diff processing happens locally in your browser, and your data is discarded immediately after proxying.
Yes! You can paste cURL commands directly into our tool. We parse the cURL command to extract the URL, HTTP method, headers, and request body, then execute the request for comparison.
We offer multiple diff view styles: side-by-side view for comparing responses side by side, unified view for a compact comparison, and both text-style and GitHub-style rendering options.